broadcasting but by no means the last. 1983, we saw the introduction of on board cameras. it was first used by nascar but very soon after took up by formula 1. hawkeye was used, very soon followed by tennis and more recently, we have had sporting events shown in 3d, everything from athletics, cricket, 3d treatment but whether it's as enduring as instant replay, we'll have to see. more on our website, aljazeera.com forward slash sports. i'll have more later. >> all right, raul, thank you very much for the time being. for our viewers in the united states it's back to your regular programming on al jazeera america. for international viewers i'm back in a moment, good morning.